It's just "busy work", as is the door-to-door ministry. At least the cart work doesn't aggravate the community as much since people can just ignore them (which is all the better as far as the witnesses sitting there is concerned).
And do not forget all the letter writing that's going on. Painfully slow and often illegible, I suspect, hand written letters that are quickly tossed by recipients.
I'm fairly certain the GB (and the entire Borg) is currently "on hold" counting on Armageddon to bail them out.......soon. Very soon.